Trencher blade for earth working machine



FIG. 1 is a left perspective view of our trencher blade design of our invention shown installed on an earth working machine;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top, left perspective view of the trencher blade;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a plan view thereof;

FIG. 6 is a right-side elevational view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear elevational view thereof; and,

FIG. 9 is a front elevational view thereof.

The broken lines showing an earth working machine in FIGS. 1 through 3 and the area within are environmental only and form no part of the claimed design. 

The ornamental design for a trencher blade for earth working machine, as shown and described. 